Malicious PDF — malware analysis report

Heuristics 8

• ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
  ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
• PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
  PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
• PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
  PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
• Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
  Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
• Embedded JS stream low PDF_JS
  PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
• External URI info PDF_URI
  PDF contains an external URL action
• Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
  The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
• Embedded URL info EMBEDDED_URL
  One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
  URL https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/731e5239805a1fd6a17a4cd419989da3/58471496101.pdf In PDF document text

  • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613f96fda3013---tokudugoliwebu.pdfIn PDF document text
  • http://hagelkonzept.com/userfiles/file/xapefuk.pdfIn PDF document text
  • https://standsimulator.com/ckfinder/userfiles/files/64615292470.pdfIn PDF document text
  • https://aihr-iadh.org/uploads/FCK_files/file/44859130618.pdfIn PDF document text
  • https://idealist.ro/userfiles/file/popazeselo.pdfIn PDF document text
  • http://www.yankey.com.tw/demo/public/editor/ckfinder/upload/user_upload/files/23417247980.pdfIn PDF document text
  • http://aaz.sk/editor_uploads/files/21406409133.pdfIn PDF document text
  • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c20ec114eb---89643023131.pdfIn PDF document text
  • https://stpeterscbs.ca/ckfinder/userfiles/files/navalisawe.pdfIn PDF document text
  • http://choinka4x4.org/cms/files/file/6194598317.pdfIn PDF document text
  • https://happycolaborativo.com/uploads/files/xowugepupugagono.pdfIn PDF document text
  • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/6a6mhshc7po1cmrk970b306iim/37267721152.pdfIn PDF document text
  • https://www.ocnistudio.cz/ckfinder/userfiles/files/53622553160.pdfIn PDF document text
  • http://maraulsan.com/ckfinder/userfiles/files/46588806645.pdfIn PDF document text
  • https://haidangpc.com/contents/files/zakewipaniwup.pdfIn PDF document text
  • https://www.domaine-boussard-chablis.fr/ckfinder/userfiles/files/jazuvevujimatenoj.pdfIn PDF document text
  • http://cottoneauto.it/userfiles/files/rutomedi.pdfIn PDF document text
  • https://www.privathospitaletkollund.com/ckfinder/userfiles/files/87851754063.pdfIn PDF document text
  • http://carraracucinecomponibilitrapani.it/userfiles/files/wolixulerukoz.pdfIn PDF document text
  • http://szjglaw.com/uploadfile/file/2021090712144073499.pdfIn PDF document text
  • http://teplorium.su/userfiles/file/32947043460.pdfIn PDF document text
  • http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/72026333545.pdfIn PDF document text
  • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614541f767a61---94413071445.pdfIn PDF document text
  • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613c016b689da---14073643498.pdfIn PDF document text
  • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=cinderella+story+online+freePDF link annotation
  • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
  • http://purl.org/dc/elements/1.1/In PDF document text
  • http://ns.adobe.com/pdf/1.3/In PDF document text
  • http://ns.adobe.com/xap/1.0/In PDF document text
  • http://ns.adobe.com/xap/1.0/mm/In PDF document text
  • http://ns.adobe.com/xap/1.0/rights/In PDF document text
  • http://dejavu.sourceforge.netIn PDF document text
  • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

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